Automatic blood pressure measuring and recording system
System and method for sensing and measuring heart beat
Non-invasive real time blood pressure measurement system Patent #: 4343314
ApplicationNo. 06/317896 filed on 10/28/1981
US Classes:600/473, Infrared radiation600/480, Pressure in blood vessel600/490Force applied against skin to close blood vessel
ExaminersPrimary: Cohen, Lee S.
Assistant: Sykes, Angela D.
Attorney, Agent or Firm
International ClassesA61B 5/024 (20060101)
A61B 5/022 (20060101)
A61B 5/0285 (20060101)
A61B 5/026 (20060101)
Foreign Application Priority Data1980-06-19 NL
AbstractA noninvasive continuous blood pressure meter that reproduces the arterial blood pressure waveform, comprising an inflatable flexible finger cuff which incorporates an infrared transmitter and receiver and electronic circuitry connected to the transmitter and receiver and controlling a dynamic compressor. The dynamic compressor comprises a bellows which is compressed by a linear motor electrically activated by the electronics. The bellows is connected to the inflatable cuff by a flexible tube to which is also attached an electronic pressure transducer, in such a way that the hollow spaces of the bellows tubing, electronic pressure transducer, and cuff form one complete closed air-filled space. When the inflatable cuff is wound around the finger and the electronics are properly adjusted, the signal from the electronic pressure transducer will very nearly correspond to instantaneous arterial blood pressure.